Soil organic nitrogen endows invasive Solidago canadensis with greater advantages in low-phosphorus conditions
Soil organic nitrogen endows invasive Solidago canadensis with greater advantages in low-phosphorus conditions
复制标题
土壤有机氮赋予入侵加拿大一枝黄花在低磷条件下更大的优势
DOI：
10.1002/ecs2.1254
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发表时间：
2016
期刊：
影响因子：
2.7
通讯作者：
Wei-Ming He
中科院分区：
文献类型：
--
作者：
Hong-Wei Yu;Jian-Xia Yang;Yan Gao;Wei-Ming He
尽管人们早已认识到土壤氮 (N) 和磷 (P) 在植物营养中的重要性，但尚无研究探讨土壤有机氮和磷如何促进入侵植物的成功。为此，我们进行了两项实验，其中入侵性加拿大一枝黄花和本地一枝黄花。 decurrens要么接受五种氨基酸处理，要么在两种磷水平下接受有机和无机氮处理（即五种氨基酸和五种硝酸铵比例）。在第一个实验中，S. 加拿大和S. 当提供五种氨基酸时，decurrens 比不提供氮时长得更高，这表明这两个物种都可以利用土壤氨基酸作为氮源。在第二个实验中，S. canadensis 比 S 长得更大更高。 有机氮和无机氮存在下，有机氮对S的生长优势表现出更大的积极作用。 加拿大相对于S。 比无机氮减少；磷水平通过改变生物量分配和叶片叶绿素来影响有机氮对植物生长的影响。这些结果表明，有机氮和无机氮可能对入侵物种的生长优势有不同的贡献。考虑植物有机氮经济对于阐明入侵机制和扩展植物策略是必要的。
Although the importance of soil nitrogen (N) and phosphorus (P) has long been recognized in plant nutrition, no study has addressed how soil organic N and P contribute to the success of invasive plants. To do so, we conducted two experiments in which invasiveSolidago canadensisand nativeS. decurrenswere either subjected to five amino acids or subjected to organic and inorganic N treatments (i.e., five amino acids and five ratios of nitrate to ammonium) under two P levels. In the first experiment,S. canadensisandS. decurrensgrew taller when five amino acids were supplied than when no N was supplied, suggesting both species can use soil amino acids as N sources. In a second experiment,S. canadensisgrew larger and taller thanS. decurrensin the presence of organic and inorganic N, and organic N exhibited greater positive effects on the growth advantage ofS. canadensisrelative toS. decurrensthan inorganic N; P levels influenced the effects of organic N on plant growth through changing biomass allocation and leaf chlorophyll. These results suggest that organic N and inorganic N may differentially contribute to the growth advantage of invasive species. Considering plant organic N economy is necessary to elucidate invasion mechanisms and expand plant strategies.